Cow-milker



(No Model.)

B. B. DOUGLASS.

00w MILKER.

Patented Apr. 12, 1887.

witness's o Swen-m as X F 24 N, PETERS. PhowLilIwgnbher. Wa'fllinglou.QC.

UNITED. STATES PATENT OFFICE.

ELIAS B. DOUGLASS, OF CORTLAND, INDIANA.

-COW-MILKER.

SPECIFICATION forming part of Letters Patent No. 361,213, dated April12, 1887.

Application filedJanuary 24, 1867. Serial No. 225,287. (No model.)

To all whom it may concern..-

Be it known that I, ELIAS B. DOUGLASS, a citizen of the United States,and a resident of Cortland, in the county of Jackson and State ofIndiana, haveinvented certain new and useful Improvements inOow-Milkers; and I do hereby declare that the following is a full,clear, and exact description of the invention, which will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, which form a part ofthis specification, and in whichi Figure 1 is a perspective view of myimproved cow-milker, showing it applied. Fig. 2 is a vertical sectionalview of the milker; and Fig. 3 is a perspective view of the upper end ofone of the nipples, showing the spring for securing it to the teat.

responding parts in all the figures.

My invention has relation to that class of cow-milkers in which the milkis drawn from the teats by means of an elastic bulb having suitablenipples for fitting upon the teats, and having a valve at its lower endwhich will admit of the milk'being discharged through the said end, andat the same time prevent air from entering the bulb; and it consists inthe improved construction and combination of parts of the same, ashereinafter more fully described and claimed.

In the accompanying drawings, the numeral 1 indicates the elastic bulb,preferably made of rubber, and this bulb is provided at its upper endwith a neck, 2, to which is secured a four-pronged nozzle, 3, havingfour channels, 4, converging into a main channel,.5, entering the upperend of the bulb. The lower end of the bulb has a screw-threaded neck, 6,upon which is screwed a threaded cap, 7, having a perforation, 8, in itstop, and a valve, 9, fits over this screw-threaded neck, being confinedby the cap and opening outward within the cap, so that fluids containedin the bulb may be forced out through the neck past the valve, while airmay not pass into the bulb through i the valve.

Nipples 10 are secured with their lower con- 5o tracted ends to the fourprongs or necks of the Similar numerals of reference indicate cornozzle, and these nipples are formed of rubber or similar elasticmaterial, and formed to correspond to the shape of a teat. The mouth ofthe nipple is formed with a wide seam or fold, 11, and a spring, 12, offlat spring metal or similar material, is inclosed in this scam, and hasa flat head, 13, at one end, formed with a slot, 14, through which theother end of the spring passes, and the free end of the spring is formedwith a series of perforations, 15. The head 13 is provided with a pin,16,which projects into the slot 14, and when the free end of the springis passed through theslot the pin engages with one of the perforationsand secures'the mouth of the nipple around the teat.

It will now be seen that when the device is to be put into operation thenipples are slipped upon the teats, the springs being opened to allowthe nipples to slip freely upon them,whereupon the springs are drawntogether suf- 7o ficiently to hold the nipples in place. By nowcompressing the bulb and again allowing it to expand, the milk will bedrawn out of the udder by the vacuum formed bythe expandingbulb and beforced out when the bulb is com- 7 5 pressed, all four teats being thusmilked out at the same time, and by an easy and .natural operation, thesuction created by the bulb being similar to the suction created by thecalf in sucking.

This device is simple of construction, and

- may be manufactured at a comparatively low cost, and it will beapplicable to all cows, on account of the adjustability of the nipplesby the springs; and it will be seen that with cows 8 5 having soreteats, or cows which are troublesome to milk, the gentle action of themachine and absence of pressure upon the teats will render the milkingeasy and painless for the cow, as well as easy and free from trouble forgo the operator.

Having thus described my invention, I claim and desire to secure byLetters Patent of the United States 1. In a cow milker, the combinationof a nipple to fit the teat, and having a wide seam or fold at its widemouth,with a flat spring secured in the said seam or fold, and having aslotted flat head at one end formed with a pin, andhaving its free endformed with a series Ico of perforations and passing through the slot,the pin engaging one of the perforations, as and for the purpose shownand set forth.

2. In a cow-milker, the combination of an elastic bulb, a neck at thelower end of the bulb having a screw-threaded and perforated cap mouths,and fiat springs within these folds or seams having flat slotted headsformed with a 1 pin, and having a series of perforations in their freeends, the said ends sliding in the slots and fitting with theperforations upon the pins, as

and for the purpose shown and set forth.

In testimony that I claim the foregoing as my own I have hereuntoafiixed my signature in presence of two witnesses.

ELIAS B. DOUGLASS,

Witnesses;

J noon BROWN, Bnnon KEEN.

